ML20235K098

From kanterella
Jump to navigation Jump to search

Informs That Periodicity of RCS Thermal Expansion Monitoring Surveillances Returned to Normal Following Completion of Twice Per Shift Exam to Detect Possible RCS Leakage as Reported to NRC on 870724
ML20235K098
Person / Time
Site: Trojan File:Portland General Electric icon.png
Issue date: 09/30/1987
From: Cockfield D
PORTLAND GENERAL ELECTRIC CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
TAC-61405, NUDOCS 8710020236
Download: ML20235K098 (1)


Text

,, , . . . - . .. .. . . . . . .. . . . .

Portland GeneralElectricCompany David W. Cockfield Vice President, Nuclear September 30, 1987 Trojan Nucicar Plant Docket 50-344 License NPF-1 U.S. Nuclear Regulatory Commission ATTN: Document Control Deck Washington DC 20555 i

Dear Sir:

l Reactor Coolant System Thermal Expansion Monitoring l

The Nuclear Regulatory Commission (NRC) letter of June 16, 1986 requires 'l l

Portland General Electric Company to provido periodic reports of the results ]

of the monitoring program for Reactor Coolant System (RCS) thermal expansion I

and contraction. During the 1987 refueling outage, a Plant cooldown and l heatup occurred and the thermal growth of the RCS was monitored. The moni-toring program measurements were evaluated and determined to be acceptable.

During the last operating cycle, the periodicity of monitoring Containment sump inventory and Containment atmosphere particulate was changed to twice i per shift to detect possible RCS leakage. This change was an interim measure pending ultrasonic examination of the "B" RCS loop hot leg elbow in 1987. Since this examination has been completed (reported to the NRC in our July 24, 1987 letter), the periodicity of the surveillance is being j l ceturned to normal. I Sincerely.

T

\

l f QY c: Mr. John B. Martin Regional Administrator, Region V  !

U.S. Nuclear Regulatory Commission Mr. David Kish, Director State of Oregon Department of Energy Mr. R. C. Barr NRC Resident Inspector Trojan Nuclear Plant 0l

9 8710020236 B7093034 DR ADOCK OSO 121 SW Satmon Street. Port
ard Oregon 97204

__ - _ _ _ _ _ _ _ - _ - _ _